# Haoran Wang > Full Stack Engineer Location: San Francisco, California, United States Profile: https://flows.cv/haoranwang A wide range of experience of full-stack web and mobile development in Java, JavaScript, Python, Go, Spring, React, Vue and React Native. ## Work Experience ### Full Stack Engineer @ AtlasNova AI Jan 2024 – Present | Cupertino, CA • Architected a low-latency AI agent platform using React.js, FastAPI/Python and Server-Sent Events (SSE) to stream LLM responses in real time, powering automated research and report generation workflows. • Built a rich-text AI report editor with React, TypeScript, Tailwind, and Lexical, rendering structured outputs with interactive charts using Chart.js and D3.js. • Implemented Redis-backed session and report caching to reduce prompt payload size and optimize context reuse, cutting LLM API costs by ~35%. • Designed a state-machine SSE stream parser with prefix matching, partial-tag carryover, and schema-validated structured block emission, improving streaming stability and reducing malformed structured-output errors. • Introduced an Indexed DB-backed local queue for high-frequency document edits, batching rapid updates with debounced backend sync to reduce write amplification; additionally cached recent report state and agent conversations locally to enable instant reloading and session recovery. • Served images and media assets via CDN to significantly reduce frontend load latency and improve dashboard performance. • Built a distributed scheduling and media generation system using AWS EventBridge Scheduler, Lambda, DynamoDB, and Celery workers, powering automated jobs and scalable image/video generation pipelines with real-time progress updates via WebSockets. • Implemented Stripe-based subscription and payment infrastructure with Node.js/Express and DynamoDB, supporting webhooks, proration, promotion codes, and refunds. • Integrated PostHog to track user behavior, feature usage, and workflow engagement, enabling data-driven product iteration. ### Full Stack Engineer @ Mulan AI Jan 2025 – Jan 2026 | San Francisco Bay Area • Designed and implemented a DAG-based workflow execution engine supporting dependency-aware scheduling and configurable node concurrency, enabling parallel execution of image and video generation pipelines. • Implemented input-hash node caching and snapshot-based partial recomputation, allowing workflows to reuse previous results and rerun only modified nodes instead of the entire pipeline. • Developed an asynchronous AI inference pipeline using Celery workers and webhook callbacks, integrating AIHub to handle long-running image and video generation tasks. • Built a visual AI workflow builder using React.js and ReactFlow, allowing users to design custom pipelines for automated image and video generation. • Optimized canvas performance by implementing debounced snapshot persistence with AbortController cancellation, preventing redundant save requests during node drag operations and improving editor responsiveness. ### Software Engineer @ PaperGen Jan 2024 – Jan 2024 | California, United States • Developed frontend using Next.js, Tailwind CSS, TypeScript and Zustand, integrated a Notion-like web editor built with Tiptap, driving an increase of 1000+ new users. • Connected the StealthGPT API to humanize AI-generated articles and integrated the Copyleaks API to check the plagiarism and AI-generation percentages for articles. • Automated detection of unused images and variables in files by writing Python Automation scripts. • Hoste a FastAPI/Python and PostgreSQL backend service using Prisma ORM on AWS, enabling real-time article updates. ### Software Developer @ Naralytics Jan 2024 – Jan 2024 | San Diego Metropolitan Area • Designed and implemented a login system using Firebase Authentication SDK and ContextAPI, adding Google/LinkedIn login options to improve user accessibility. • Integrated Mixpanel to monitor click-through rates and user dwell time on each interface and used analytics to identify key drop-off points and guided a complete app redesign. • Reconstructed 100+ pages and launched a new "Story Library" feature where users can share, like and save stories with React Native and Firebase, attracting 3000+ new users and improving engagement metrics. • Built a Node.js/Express.js server with Redis caching, reducing response latency by 40%. • Developed and deployed RESTful APIs using FastAPI for multiple ML/AI models, ensuring efficient and reliable performance on Google Cloud Platform through load balancing and API gateway setup. ### Full Stack Intern @ OmniSynkAI Jan 2024 – Jan 2024 | Baltimore, Maryland, United States • Developed RESTful APIs from scratch using Node.js and Express and integrated with Name.com APIs for domain reselling. • Created domain management dashboard with Next.js, TypeScript, Redux Toolkit and Tailwind CSS. • Integrated Stripe SDK and PaymentElement to facilitate secure transactions on the platform. • Optimized frontend search functionality by implementing AbortController to cancel redundant HTTP requests. ### Software Engineer Intern @ LIAA Jan 2024 – Jan 2024 | New York, United States • Developed the dashboard with React.js, Tailwind CSS and implemented data storage using Cloud Firestore. • Integrated Deepgram JavaScript SDK for speech-to-text functionality, increasing transcription accuracy by 20%. • Applied Azure OpenAI API to create an intelligent AI assistant to help doctors generate desired output based on transcripts and requirements, improving user experiences and satisfaction by 50%. • Implemented CI/CD pipeline with GitHub Actions, enabling automated deployment of web app to Vercel. ### Software Engineer @ Lenovo Jan 2023 – Jan 2023 | Shenzhen, Guangdong, China • Built an Automation System using Java and Spring Cloud to enable real-time monitoring of test progress, integrating RabbitMQ for message queuing and RedisTemplate for processed data storage. • Used Java CompletableFuture to process results asynchronously while maintaining thread safety using Pessimistic Lock. • Configured WebSocket with a Pub/Sub model to push test results to client side in real-time. • Developed RESTful APIs for a system using Go, Gin framework and MySQL, and built the frontend pages with Vue.js. ## Education ### Master of Science - MS in Business Analytics Washington University in St. Louis ### Bachelor of Science - BS in Finance, General The Chinese University of Hong Kong, Shenzhen 香港中文大学（深圳） ## Contact & Social - LinkedIn: https://linkedin.com/in/haoranw1402 --- Source: https://flows.cv/haoranwang JSON Resume: https://flows.cv/haoranwang/resume.json Last updated: 2026-04-05